Process for rough turning in the lathe or similar machine tool



P. QUICHON 1,976,459

PROCESS FOR ROUGH TURNING IN THE LATHE OR SIMILAR MACHINE TOOL Oct. 9, 1934.

Filed Dec. 7, 1932 2 Sheets-Sheet P Quick) "When/T012 Oct. 9, 1934. P u c o 1,976,459

PROCESS FOR ROUGH TURNING IN THE LATHE OR SIMILAR MACHINE TOOL Filed Dec. 7, '1932 2 Sheets-Sheet 2 P 5 mm) INYNTO )2 Patented Oct. 9, ,1934

UNITED hsra'rss P TENT. ,osnes;

1,916,459. ,raoosss ron aouon mama m m -m'rns on snunna moms root.

rm Quichon, Paris, France, sal ne!" at Compagnie Des Forges De Chatillon Comment" Paris, France & Kenya-liaisons,

Application December '1, 1932, Serial" No. 646,195

InhanceNovember 2, 1931 v i 4 Claims. (01. sz-u) This invention has for its object aprocess allowing to easily and rapidly effect superficial rough turning of products made of metal or other substance, whether this operation is adapted to according to this process, even those having a I non rectilinear longitudinal axis; their straight. section may also beof-any shape, provided ofcourse they do not present a too acute re-entering m I remove a certain thickness of materialon the angl outer surface, or'to eliminatedefects in the material constituting the peripheral layer of the products.

- Another advantage of the present process is 10 that it is-possible to carzy it on most easilyon any lathe or similar machine-tool, and it always.

operates in the best conditions, whatever may be the shape and dimensions of the product to be roughened out.

According to the invention, rough turning is ensured for instance by a lathe/tool, in front of which the work to be roughened out is mounted as-for an ordinary turning 03 operation. The tool-carrier is free to slide on the frame of the 80 machine at right angles to the axis of rotation of the work, and it is constantly urged towards the latter by a suitably arranged returning device.

n the side of the tool, a roller or other suitable abutment member is mounted .on the tool- 3 carrier and bears on the surface of the work under the action of the above returning device.

This roller is placed in front of the tool, and, consequently, bears on a norn'oughened out portion of the work, the position of the tool 80 is adjusted in such amanner that it removes,-

til with such a former: it is in fact impossible that the shapeof a former should exactly correspond to that of an ingot for instance, since the latter is very irregular.

Since the member to work guides the tool by itself according to the present process, all the drawbacks inherent to the use of an independent former are avoided.

Variations of tension of the returning device which, by way'of example, can be constituted by a spring, due to the variations of radius of the work, have no influence on the working conditions of the tool, the tension of the returning device being partly absorbed by the roller bearing on the work.

v5 Products of any shape can be roughened out e. a The lateral space necessarily existing between the roller and the tool prevents the roughing out of the entire surface of the work in a single cut.. The invention-provides a special arrangement. which wiilbe described hereinafter, and by means 6 of which the entire surface can be conveniently roughened out in two successive cuts, by effecting a very simple and rapid adjustment at'the end of the first out before effecting the second cut.

It is to be'noted that instead-of a'lathe tool. use can be made of any other tool allowing to rough turn or to removethe burrs from the work,

for instance a milling cutter, a grinding wheel, etc. by providing for this tool any suitable drive. (I

The invention will be more clearly understood from the following descriptiomwith reference to the diagrammatic accompanying drawings, given by way of example only, and in which:

Figs. 1 to 3, which illustrate the entire lathe, are respectively an end view, ,a side view and a plan view of the same.

Figs. 4 and 5 are diagrammatic plan views a showing the method of mounting the tool at the end of the first cut and at the beginning of the second cut, respectively.

In the drawings, 1 designates an'ingot to be rough turned. I This ingot is mounted on a lathe, or on any other machine capable of effecting the operation 00 to be. hereinafter described. 7

, In'the case given asexample, the said j,--. is held by its dead or discard lead 111:, on the face l plate 2 of thel'athe, by means of-stops and, at

the other end, it is carried at its center by the back centre 3.

The roughing out operation is effected means of a tool 4 which is mounted on a tool- 1 carrierfifree on its slidesoastobe abletomove' at right angles to the axis of the ingot.

At the lower part, the carriage carries a nut 5a in which is screwed a screw -.6 perpendicular to the axis of rotation of the work; at the end of this screw is threaded a spring -'I which, being compressed between the frame and a bearing 106 washer'6a' secured on the screw, constantly urges the tool-carrier towards the ingot. 3

0n the other hand, on the tool-carrier is'mounted a roller 8 preferably placed as near as possible to the tool 4, in front of the latter. ll.

, The roughing out follows:

The roller 8 is moved in contact with the end of operation takes place as theingot which is carried by the back centre 3,

3 and the position 01' the tool 4 is adjusted in such manner that it extends beyond the tool to an extent a corresponding to the thickness of the superficial layer to be removed.

The automatic longitudinal clamping mechaknism ensuring the feed of the tool is so adjusted as to ensure the desired width of cut, and the roughing out operation automatically takes place on an approximately constant thickness, the tool the same:

Y The carriage is moved back towards the right of the tool, that is to say towards the portion already roughened out, the tool 4 is withdrawn within its housing and replaced by a tool placed in front of the roller 8, atthe same level '&S the latter (F13. 5).

The longitudinal feed mechanism is re-started and the roughing out operation is thus completed,

the tool 4a being'guided, during this second cut, y the roller 8 which bears on the portion or the in ot already roughened out.

' The depth of cut'can be adjusted by means of screws 4b or 4c or equivalent devices adapted to control the distance by which the tools project beyond the roller 8.

It is to be understood that any arrangements equivalent to that just described can be provided for effecting these two phases of the roughing out operation with guiding alternately on the nonroughened out portion and on the roughened out portion of the ingot-z a single tool can for instance be provided, this'tool being placed between two rollers which can be alternately put in operative and in inoperative position, and the passage from one phase to the other can take place at any moment; moreover, the method of mounting the tool-carrier,-t he returning device with which it cooperates, the arrangement oi. the abutment serving to guide the tool, etc. can be moditied in any suitable manner, without departing from the scope or the invention; furthermore, in-

I stead of a lathe tool, use can be made, as above stated, of any other convenient tool suitably driven; finally, several of the roughing out devices can be mounted and simulatneousiy emplayed on one and the same machine;

I claim: v

1. I: a device for skinning a rough metal part of any kind rotatably mounted on a machine tool, a cutting tool and a guide roller, a. tool carrier on which said cutting tool and guide roller are mounted, means for moving said tool carrier parallel to the axis of rotation of said part and positively transversely of said axis of rotation, means for urging said tool carrier toward'said part and means for independently adjusting the distance of the cutting tool and of the guide roller irom the axis of rotation oi the part, whereby the cutting tool may be guided to and from the axis of rotation in accordance with the conformation of the work.

2. In a device for skinning a rough metal part of any kind rotatably mounted on a machine tool, a cutting tool and a guide roller, a tool carrier on which said cutting tool and guide roller are mounted with the point of the cutting tool, the axis of the guide roller and? the axis of rotation of said part in one plane, means for moving said tool carrier parallel to the axis 01' rotation of said part and positively transversely, of said axis 01105 rotatiommeansurging said tool toward said part and means for independently adjusting the distance of the cutting tool and of the guide roller from the axis of rotation of the part, the guide roller being of slight thickness and located close no to the cutting tool. v 3. The device according to claim 2, in which means are provided for supporting the cutting tool either before or behind the guide roller whereby the guide roller will bear on the rough por- 1:5 tion of the part or on the cut portion or the part as may be desired, Y

4. The device according to claim 2, in which one cutting tool is mounteduahead oi the guide roller and one cutting tool mounted behind the fig guide roller with the cutting points in the same plane and independent means for positively moving each cutting tool toward or away from the axis of rotation of the part.

PAUL QUICHON. 

